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CS6420-CS Datasheet(PDF) 1 Page - Cirrus Logic |
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CS6420-CS Datasheet(HTML) 1 Page - Cirrus Logic |
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1 / 52 page  Preliminary Product Information This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice. 1 Copyright © Cirrus Logic, Inc. 1997 (All Rights Reserved) Cirrus Logic, Inc. Crystal Semiconductor Products Division P.O. Box 17847, Austin, Texas 78760 (512) 445 7222 FAX: (512) 445 7581 http://www.crystal.com CS6420 Full-Duplex Speakerphone Chip Features l Single-chip full-duplex hands-free operation l Automatic gain control l Optional 34 dB microphone preamplifier l Integrated mute and volume control l Integrated 80 dB IDR dual codec l Speech-trained Network and Acoustic Echo Cancellers l Powerdown mode l Microcontroller Interface General Description Most modern speakerphones use half-duplex operation, which switches transmission between the far-end talker and the speakerphone user. This is done because the acoustic coupling between the speaker and microphone is much higher in speakerphones than in handsets where the coupling is mechanically suppressed. The CS6420 enables full-duplex conversation with a sin- gle-chip solution. The CS6420 can easily replace existing half-duplex speakerphone ICs with a huge in- crease in conversation quality. The CS6420 consists of telephone & audio interfaces, two codecs and an echo-cancelling DSP. ORDERING INFORMATION CS6420-CS 20-pin SOIC CDB6420 Evaluation Board BANDGAP AO DGND NI DATA STROBE DRDY CLKI CLKO API RST Microcontroller Interface NO AVDD DVDD AVDD NC4 NC3 NC2 NC1 AGND 0,6,9.5,12 dB Σ + - Pre-Emphasis Network Echo Canceller Filter 0,6,9.5,12 dB Σ + - Filter Echo Canceller Acoustic Pre-Emphasis APO MB 34 dB 1 k Ω 2.12 V 3.5 V Clock Generation JUN ‘97 DS205PP2 |
Similar Part No. - CS6420-CS |
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Similar Description - CS6420-CS |
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